Speed-controlling device.



c. E. PALMER. SPEED CONTROLLING DEVICE.

LPPLIOATIOH FILED JAN. 2, 19Q8.

I r tenniijitul 6; 1909.

a .No. 027,159.

UNITED-straws PATENT OFFICE.

ilHARLES E. PALMER,1OF SPOKANE, WASHINGTON,.ASSIQNOB or ONE-HALF TO CALVIN L.

SIMMONS, or SPOKANE, WASHI'NGTON.

' Specification of Leases Patent.

Patented July 6,-19b9;

Application filed January 2, 1908. Serial IfT o .'-1i08,99l5.

To all whom it may concern:

a subject of the King of Great Britain, and

a resident of Spokane in the county of Spokane and .State of Washington, have in-- vented a new and Improved speedrconj trolllng Device, of which the following is a 1 full, clear, and exact description.

' The bbject of theinvention isto provide; a new and improved speed-controlling de-? vice, which is simple and durable in con-i struction, requires very little attention and is connected to a revolving part of the de 1 vice to be controlled, with a view to cause 5 r the device to run at all tunes at a sure,

' steady, even speed although the power or the load may increase or diminish lnstantly or gradually.

The invention consists of novel features and parts and combinations of the same,

which wi1lbe,more fully described hereinafter and then pointed out in the claim.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of time specification, in

which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a sectional side elevation of as long as the shaft. AIis turned in the direc' tion of the arrow at, andto allow the shaft A to rotate in the inverse direction of-the ar row a without rotating the crank C. The wrist pin 0 of the crankC is connected with a plurality of pitmen D, D, D pivotally connected with pistons E, E E mounted to reciprocate in the cylinders F, F, F grouped around the crank C, as plainly illustrated inv Fig. 1. The cylinders F, F

and F are opentoward the crank'C, and

the outer end of each cylinder is provided with a valve seat G adapted to be'closed by a conical valve I-I normally held in an open-1'; position by a spring I around the valve stem H extending through a nipple J and- {jthiojugh a stn fling box J screwing in the Be it known that I, CHARLES E. PALMER,

end of the stem H and adapted to abut against the outer face of the corresponding stuffing box J. As shown 111 the lower por-- 1 ti'onof Fig. 1, the nipple J forms an inte ral part of the closed. end of the correspon ing cylinder F, F or F and the several nipples are connected'by pipes K, K and with a reservoir L adapted to contain a suitable liquid selected according to .the climate in which'thedevice is used. M I y Now when the machine or other apparatus on'whieh the speed-controlling device is used is running andthe shaft A rotates in the direction of the arrow a, then the crank G reciprocates the several pistons E, E, E in Q the cylinders F, F, F? by the action of their pitmen D, D, D Now when the several parts are in the position shown in Fig. 1, then the piston E is on the lip-stroke and drawn-in liquid in the cylinder F out of the latter by way of the pipe K into the reservoir L. The piston E is nearing the inward stroke and draws the liquid from the reservoir L by way of the pipe K 3 Now as the crank C rotates, it is evident that the several devices connected with the crank G act as pumps, to alternately draw the; liquid. from the reservoir L and to return the same on the outward strokes of "the corresponding pistons E, E, E Now when the machine running normally, thelliquid forcedfouticf a cylinder F, F or F by the corresponding piston E, E or E does not close the valve H, as the latter is held open by the spring I, the tension of which is regulated "or set by adjusting the corresponding stalling box d. lVhen the load increases or th'e speed of the shaft A tends to increase, then the valves 11 are forced into closer relation tothe valve seats G by the increasedpressure exerted by the pistons E, E, E on the liquid in the cylinders F, F. and F and which pressure is dueto the increased load or the tendency of case of an emergency, the valve I-I is provided with an emergency port H to connect the interior of the corresponding cylinder With the corresponding nipple J, it being understood that the emergency port H allows the liquid, when under a-higher pressure than estimated or calculatech'to pass from the cylinders to the reservoir or vice versa, and thus allow the governor to continue its duties Without damage to the device.

Although three pumping devices are described and illustrated in Fig. 1, it is evident that one or more such pumping devices may be employed if desired.

The speed-controlling device or governor illustrated and above set forth, is especially serviceable for use on machanism requiring a sure, steady and even or uniform speed, such as automatic fire escapes, mining'and other elevators and marine engines, to prevent racing of the propellers, etc.

l'l aving thus described my invention, 1 claim as new and desire to secure by Letters Patent:

A speed controlling device, comprising a.

driven shaft, a crank disk having a pawl and ratchet connection, with the driven shaft, a plurality of cylinders arranged radially of the shaft and at equal distances from each other, pistons in the cylinders, rods connecting the pistons with the disk, .the connection of the. rods With the disk being eccentric thereto, a reservoir, an independent connection between each of the cylinders and the reservoir, a valve controlllng each connection, a spring normally holding the valve against a predetermined pressure in the cylinder and means for regulating the tension of the spring, the valve being provided with a by pass for the purpose set forth.

In testimony whereof I have signed my 

